OSCommerce Adjustments and goToWebinar API implementation

Project turnaround 4 days !!! has to be delivered by Friday. Project is expected to start on monday and finished the same week. For an in-house created PHP based solution we would require and independent LAMP programmer with Ajax, JQUERY and OsCommerce knowledge to implement custom features: Most of those features for OSCommerce exist partially as contributions, just need to be modified or adapted to our 2.3.1 version (from 2.2). It should Those Features would include the following Items, ordered by priority • goToWebinar integration thought API • Activate user accounts after shop payment • Multiple price groups in shop for the same article • Send webinar information, after purchasing webinar. • Multiple price groups in shop for the same article • Newsletter signup • Coupon codes with printing Functionallity ( PDF) and email functionality nice formatted email • Grouping of Products into Categories, and assign Shipment Conditions to each group Time frame is challenging but it can be done !